Presser-foot lifter for sewing machines



R. KAM-:R 2,250,992

RESSER-FOOT LIFTER FOR SEWING MACHINES Original Filed July 9, 1937 2 -Sheets-Sheet l Z '1` Elea/nor .Execurz .my 29,1941. R. KAIER 2,250,992

PRESSER-FOOT LIFTER FOR SEWING MACHINES Original Filed July 9, 1937 2 Sheets-Shree?l 2 Smm/11414 j Patented July 29, 1941 Y l PRESSER-FOOT LIFTER. FOR SEWING MACHINES Richard Kaier, deceased, late of Cranford, N. J., by Eleanor C. Kaier, executrix, Cranford, N. J., assignor to rIhe Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Original application July 9, 1937, Serial No.

152,707. Divided and this application November 9, 1939, Serial No. 303,631

4 Claims.

This invention relates toy sewing machines and more particularly to mechanism for raising and lowering the presser-foot of a sewing machine, and has for its objective the provision of improved means carried by and extending through an oil receptacle and so designed that the presserfoot can be raised quickly and with the minimum of effort.

With the above and other objects in view as will hereinafter appear, the invention comprises the devices, combinations and arrangement of parts hereinafter described in connection with the accompanying drawings which illustrate a preferred embodiment of the invention and in which:

Fig. 1 is a rear elevation, partly in section, of a machine embodying the invention.

Fig. 2 is a vertical sectional view taken along the line 2-2 of Fig. 1.

As shown in the drawings IU represents the bed which supports a bracket-arm I I terminating in a hollow head I2. Journaled in the head I2 is the usual needle-bar I3 and presser-bar I4 the latter of which carries a presser-foot I5 adapted to cooperate with the usual feed-dog I6. For a detailed description of the feeding and stitch-forming mechanism of the machine, reference may be had to Patent No. 2,206,285, dated July 2, 1940, and issued to R. Kaier on an application, led July 9, 1937, of which this application is a division.

An oil-reservoir I1 is secured beneath an opening I8 in the table-top I9 by means of the bolts 20. Carried by the Ireservoir I1 is a layer of vibration and sound-absorbing material 2| upon which rests the downwardly extending flange 22 of the bed I0. The bed IIJ and the reservoir I1 together form an oil-tight enclosure for the operating parts of the machine.

The reservoir I1 is die cast and is formed with a depending lug 23 and a laterally extending arm 24 the lower ends of which are 'apertured to, receive a rock-shaft 25. Fixed to one end of the shaft 25 by a set-screw 26 is a collar 21 formed with a laterally projecting portion 28' which is adapted to engage the lug. 23 and fixed to the other end of the shaft by a set-screw 29 is a collar 30 formed with a lateral extending portion 3l which is adapted to engage the arm 24. The portions 28 and 3| act as stops to limit the movement of the rock-shaft 25 in both directions of movement.

Fixed to the shaft 25 is a T-shaped member 32 which carries a depending rod 33 having a kneepad 34 adjustably secured thereto by the setscrew 35. Adjustably secured to the shaft 25 by the set-screw 36 is 'an arm 31 formed with a cupshaped depression 38 which receives the lower end of a push-rod 40. ,The rod 46 extends through a boss 4I formed on the oil receptacle l1 and the upper end of the rod cooperates with a lever 42 pivoted at 43 to the depending arms 44 of the bracket 45 which is xed to the under side of the bed IIJ. It Will be noted that the upper end of the boss 4I extends well above the bottom of the reservoir I1 and between the ends of the rod 40 there is provided an inverted cup-shaped oilguard 41. rThe level of the oil in the reservo-ir is well below the top of the boss 4I, and when oil is splashed on the upper end.' of the rod 40 or the guard 41 the oil runs over the edges of the cupshaped guard and drops back into the reservoir. This permits the rod 40 to be freely mounted in the boss 4I and prevents the oil in the reservoir from running down the rod.

The other end of the lever 42 has a ball-andsocket connection 48 with a pull-rod 49 and the upper end of this rod has an adjustable balland-socket connection 5I] with the presser-foot raising lever 5I which is pivoted to the bracketarm of the machine at 52.

Coiled about the pivot 52 is a spring 53 which has one of its ends 54 bent at right angles and extending into an `aperture in the bracket-arm. The other en-d 55 of the spring reacts against the lever 5I and constantly urges it in a clockwise direction about the pivot 52.

The end 56 of the lever 5I carries a rod 51 which extends into the hollow head I2 and is operatively connected with the spring depressed presser-bar I4 by a link 58 in the usual and Well known manner.

From the foregoing it will be understood that when the rod 33 is moved to the left, as viewed in Figure 1, the arm 31 will raise the rod 40 and shift the lever 42 about its pivot 43. 'I'his movement of the l'ever 42 pulls down on the rod 49 and shifts the lever 5I in a counterclockwise direction about its pivot 52 and the end 56 of the lever 5I through the rod 51 and link 58 raises the presser-bar I4 and presser-foot I5.

Having thus set forth the nature of the invention, what is claimed herein is:

1. In combination with an oil-reservoir provided with depending supporting members and a sewing machine resiliently supported upon the oil-reservoir, a rock-shaft journaled in said depending supporting members, said sewing machine having a presser-bar, manual means for actuating said rock-shaft, a rod slidable through a. boss formed on said reservoir and having an operative connection with said rock-shaft, an oil-guard carried by said rod and overlying said boss, and mechanism for operatively connecting said rod to the presser-bar of the sewing machine.

2. In combination with an oil-reservoir provided with depending supporting members and supported by a table and a sewing machine resting on the oil-reservoir and having a presserbar, a rock-shaft journaled in said depending supporting members, manual means for actuating said rock-shaft, an arm on said shaft, a push-rod adapted for actuation by said arm and extending into said reservoir, said push-rodbeing confined to a right line movement, a lever carried beneath the bed of the machine and in operative engagement with said push-rod, and means connecting said lever to the presser-bar of the sewing machine whereby said presser-bar may be raised and lowered.

3. In combination with a supported reservoir adapted to contain a quantity of oil and a sewing machine resting on the reservoir and lubricated by the oil in the reservoir, said sewing machine having a presser-bar, a plurality of bearing lugs formed on said reservoir, a shaft journaled in said Iugamanual' means for rocking said shaft, a

vertical rod slidable through an aperture in the bottom of the reservoir and having one of its ends in operative engagement with an arm carried by said shaft, means for preventing oil from escaping from said reservoir along said rod, and mechanism connecting the end of the rod which is within the reservoir with the presser-bar of the sewing machine.

4. In combination with a supported reservoir adapted to contain a quantity of oil and a sewing machine resting on the reservoir and lubricated by the oil in the reservoir, said sewing machine having a presser-bar, a plurality of supporting members formed on the under side of said reservoir, a shaft journaled in said members, a rod movable endwise through a boss formed on the bottom of the reservoir, a guard on said rod for preventing oil from running down the rod, means connecting one end of the rod with the presserbar of the machine, and manual means operatively connected with the other end of the rod for raising and lowering the presser-bar from a point below the oil-reservoir.

ELEANOR C. KAIER, Eecutrzrc of the Last Will and Testament of Richard Kaz'er, Deceased. 

